See inside cover for models covered by these instructions
Installation & Service Instructions
Suprima 30 - 80
Wall Mounted Fan Assisted
Balanced Flue Gas Boilers
THE GAS SAFETY (INSTALLATION AND USE) REGULATIONS 1994. (as amended)
‘‘ In your own interest, and that of safety, it is law that all gas appliances are installed by competent persons,
in accordance with the above regulations. Failure to install appliances correctly could lead to prosecution.’’
Installation must be in accordance with the Installation & Service Instructions and the rules in force.
LEAVE THESE INSTRUCTIONS WITH THE USER FOR USE ON FUTURE CALLS
For Use With Natural Gas
(G20) Only At 20mbar
For Use in GB & IE
IMPORTANT
PLEASE READ THIS BOOK
BEFORE INSTALLING,
OPERATING OR SERVICING
THIS BOILER.
Contents
Technical Data ............................................................... 3
Introduction.................................................................... 4
1. Installation Requirements......................................... 4
1.1 Health & Safety Information............................... 4
1.2 Codes of Practice............................................... 4
1.3 Gas Supply......................................................... 5
1.4 Electricity Supply................................................ 5
1.5 Location of Boiler ............................................... 5
1.6 Air Supply........................................................... 7
1.7 Flue Systems ..................................................... 7
1.8 Flue Terminal Location....................................... 8
1.9 The System........................................................ 8
Flue Kits......................................................................12
System and Other Kits................................................14
2. Installation.................................................................. 16
2.1 Unpack & Prepare the Boiler.............................. 16
2.2 Install the Flue.................................................... 16
2.3 Connect the Power Supply Cable...................... 18
2.4 Install the Optional Programmer........................ 19
2.5 Connect the Gas Supply.................................... 19
2.6 Connect the Water Supply................................. 20
The models covered by these instructions are:-
Suprima 30 - G.C. No. 41 607 75
Suprima 40 - G.C. No. 41 607 76
Suprima 50 - G.C. No. 41 607 77
Suprima 60 - G.C. No. 41 607 78
Suprima 70 - G.C. No. 41 607 79
Suprima 80 - G.C. No. 41 607 80
The boiler model and serial number are given on the boiler
data label which is located on the right hand side of the
chassis and visible after opening the controls door.
3. Commissioning........................................................21
3.1 Commission the Boiler........................................22
3.2 Final Adjustments ...............................................23
3.3 Instruct the User..................................................23
3.4 Advise the User...................................................23
4. To Service the Boiler & Component
Replacement ............................................................24
4.1 General Access...................................................24
4.2 To Service the Boiler...........................................25
4.3 Component Replacement...................................25
4.3.1 Electronic Control Board.........................26
4.3.2 Air Pressure Switch................................25
4.3.3 Electrode................................................ 26
4.3.4 Burner.....................................................27
4.3.5 Injector.................................................... 27
4.3.6 Combustion Chamber Insulation............27
4.3.7 Gas Valve............................................... 28
4.3.8 Fan & Flue Hood.................................... 29
4.3.9 Temperature Sensor...............................30
4.3.10 Overheat Thermostat.............................. 30
4.3.11 Heat Exchanger......................................31
5. Functional Wiring Diagram.....................................32
6. Wiring Diagrams......................................................33
7. Fault Finding ............................................................34
8. Short List of Spares.................................................36
Technical Data - Page 3
Nominal Boiler Ratings
Boiler
models Output Input Burner setting pressure Gas Rate Injector Size
kW Btu/h kW Btu/h mbar in wg m³/h ft³/h mm dia.
5.5 19 000 7.3 25 000 4.1 1.65 0.70 24.7
30 2.8
8.8 30 000 11.0 37 500 9.3 3.70 1.05 37.1
8.5 29 000 11.0 37 500 6.1 2.45 1.05 37.1
40 3.1
11.7 40 000 14.7 50 000 11.2 4.50 1.40 49.3
11.4 39 000 14.8 50 500 6.7 2.65 1.42 50.1
50 3.5
14.7 50 000 18.3 62 500 10.3 4.10 1.75 61.8
14.4 49 000 18.6 63 500 8.6 3.45 1.78 62.9
60 3.7
17.6 60 000 22.0 75 000 12.2 4.90 2.10 74.2
17.3 59 000 22.0 75 000 9.6 3.85 2.10 74.2
70 3.9
20.5 70 000 25.6 87 500 13.4 5.35 2.45 86.4
20.1 68 500 25.6 87 500 10.7 4.28 2.45 86.4
80 4.1
23.4 80 000 29.3 100 000 13.9 5.56 2.80 98.7
Maximum Working Head 30.5m (100 ft)
Minimum Working Head 150mm (6 in)
Gas Supply Pressure 20mbar
Gas Supply Connection Rc. ½ (½ in BSP Female)
Maximum Flow Temperature 82ºC
Flow/Return Connections 22 mm Copper
Water Content 1.6 litres (0.37 gal) - 30, 40, 50 & 60 Models
2.1 litres (0.46 gal) - 70 & 80 Model
Appliance Lift Weight 26.0 kg (57.3 lbs) - 30, 40, 50 & 60 Models
30.2 kg (66.6 lbs) - 70 & 80 Model
Appliance Weight Installed - Dry 32.0 kg (70.0 lbs) - 30, 40, 50 & 60 Models
35.4 kg (78.1 lbs) - 70 & 80 Model
Electricity Supply 230v ~ 50Hz Fused at 3A
Internal Fuse Type 3.15AT
Power Consumption 80 watts (excluding pump)
Classifications CAT 12H
C12, C32 & C71 (C71 30 - 60 models only)
IP20
SAFETY, PERFORMANCE & QUALITY
Suprima boilers have been assessed by a Government appointed Notified Body and shown to meet the
‘Essential Requirements’ of the European Gas Appliance Directive.
The Directive lays down requirements for the safety and efficiency of the appliance, together with its
design, construction, and use of materials.
It also requires the production process to be covered by an approved and monitored system of quality
assurance.
Introduction - Page 4
Gas Safety (Installation & Use) Regulations 1994
(As Amended).
This appliance must be installed and serviced by a
competent person, in accordance with the above regulations.
In the UK 'Corgi' Registered Installers (including the regions
of British Gas Plc) undertake to work to a safe and
satisfactory standard.
Failure to install appliances correctly could lead to
prosecution.
It is in your own interest, and that of safety, to ensure that
the regulations are complied with.
Suprima boilers are fully automatically controlled, wall
mounted, fan powered, balanced flue appliances using a
cast iron heat exchanger and are available in outputs
ranging from 5.5 - 23.4 kW (19,000 - 80,000 Btu/h)
The boilers are designed for use on fully pumped open
vented or sealed water systems with an indirect hot water
cylinder.
THEY MUST NOT BE CONNECTED TO A DIRECT
CYLINDER.
The boilers are for use on Natural Gas (G20) only.
Samples of the Potterton Suprima gas boilers have been
examined by British Gas Plc, a United Kingdom Notified
Body. The range is certified to comply with the essential
requirements of the Gas Appliance Directive 90/396/EEC,
the Low Voltage Directive 72/23/EEC and shows compliance
with the Electro Magnetic Compatibility Directive
89/336/EEC and are therefore permitted to carry the CE
Mark.
Delivery & Kits Available
The unit is delivered in two packages (1) the boiler with
fittings and (2) the flue/terminal assembly. See pages 12 &
13 for flue options.
Various kits are available for the Suprima range of boilers,
see pages 14 & 15.
1. Installation Requirements - Page 4
1.1 Health and Safety Information for the
Installer and Service Engineer
Under the Consumer Protection Act 1987 and Section 6 of
the Health and Safety at Work Act 1974, we are required to
provide information on substances hazardous to health.
Small quantities of adhesives and sealants used in the
product are cured and present no known hazards.
The following substances are also present.
Insulation and Seals
Material - Man Made Mineral Fibre.
Description - Boards, Ropes, Gaskets.
Known Hazards - Some people can suffer reddening and
itching of the skin. Fibre entry into the eye will cause
foreign body irritation which can cause severe irritation
to people wearing contact lenses. Irritation to respiratory
tract.
Precautions - Dust goggles will protect eyes. People with a
history of skin complaints may be particularly
susceptible to irritation. High dust levels are only likely to
arise following harsh abrasion. In general, normal
handling and use will not present high risk, follow good
hygiene practices, wash hands before, touching eyes,
consuming food, drinking or using the toilet.
First Aid - Medical attention must be sought following eye
contact or prolonged reddening of the skin.
1.2 Codes of Practice
The boiler must be installed in accordance with: The Gas
Safety (Installation and Use) Regulations 1994 (As
Amended) and the current issue of:-
The Building Regulations, Building Standards (Scotland)
Regulations, Local Building Regulations, Model and local
Water Undertaking Bye-laws, IEE Wiring Regulations and
Health & Safety Document No. 635 "The Electrician At Work
Regulations 1989".
Installation Requirements - Page 5
1.3 Gas Supply
The meter and supply pipes must be capable of delivering this quantity of gas in addition to the demand from any other
appliances in the house and must be governed at the meter.
The complete installation must be tested for gas soundness and purged as described in BS6891.
1.4 Electricity Supply
230V ~ 50Hz via a fused double pole switch with a contact separation of at least 3 mm in both poles adjacent to the boiler.
Power consumption is approximately 150W. There must be only one common isolator for the boiler and its control system
and it must provide complete electrical isolation.
Fuse the supply at 3 A. The minimum requirement for the power supply cable is that it should be a PVC sheathed cord at
least 0.75 mm
2
(24 x 0.2 mm) (code designation HO5 VV-F or HO5 VVH2-F) as specified in table 16 of BS6500:1984.
All wiring external to the boiler shall comply with the latest IEE Wiring Regulations, and any local regulations which apply.
WARNING: THIS APPLIANCE MUST BE EARTHED.
In the event of an electrical fault after installation of the boiler, preliminary electrical systems checks must be carried out i.e.
Earth Continuity, Short Circuit, Polarity and Resistance to Earth.
1.5 Location of Boiler
The boiler is not suitable for external installation unless it is suitably protected.
If the sealed system kit (Part No. 238027) is being used, this should be installed first. See instructions supplied with kit.
The boiler must be installed so that the flue terminal is exposed to the external air. It is important that the position of the
terminal allows the free passage of air across it at all times.
The boiler must be mounted on a flat wall which is sufficiently robust to take the weight of the boiler.
The boiler is suitable for installation to a combustible wall e.g. wood cladding, provided that the flue duct is not closer than
25 mm to combustible material. A metal sleeve should be installed to surround the flue duct to provide a 25mm annular
space. Further guidance is given in BS5440:1:1990, sub-clauses 3.3 and 4.2.5.
If the boiler is to be installed in a timber framed building it should be fitted in accordance with the British Gas publication-
Part 19 - Building and Kitchen Work. If in doubt advice must be sought from Potterton Myson.
The boiler may be installed in any room, although particular attention is drawn to the requirements of the current IEE Wiring
Regulations and, in Scotland, the electrical provisions of the Building Standards applicable in Scotland with respect to the
installation of the boiler in a room containing a bath or shower.
Where a room-sealed appliance is installed in a room containing a bath or shower, any electrical switch or appliance control,
utilising mains electricity should be so situated that it cannot be touched by a person using the bath or shower.
Where the installation of the boiler will be in an unusual position, special procedures may be necessary and BS6798 and
BS5546 give detailed guidance on this aspect.
A cupboard or compartment used to enclose the boiler must be designed and constructed specifically for this purpose. An
existing cupboard or compartment may be used provided that it is modified for the purpose. Details of essential features of
cupboard/compartment design including airing cupboard installations are given in BS6798 and BS5546 and should be
complied with.
The boiler requires only the clearances shown on Page 6, after installation.
Installation Requirements - Page 6
Installation Requirements - Page 7
1.6 Air Supply
The air requirements must meet BS 5440 Part 2.
The room in which the boiler is installed does not require a purpose provided air vent.
If the boiler is installed in a cupboard or compartment, permanent air vents are required in the cupboard or compartment,
one at high level and one at low level, either direct to the outside air or to a room. Both high level and low level air vents
must communicate with the same room or must be on the same wall to outside air. Both the high level and low level vent
must each have a free area as stated below. The free area of each vent may be halved if the ventilation is provided directly
from outside.
Models: 30: 99 cm² 40: 133 cm² 50: 169 cm²
60: 198 cm² 70: 231 cm² 80: 264 cm²
If the boiler is installed in a cupboard or compartment with a door, allow at least 15 mm clearance between the front of the
boiler and the door for air movement.
1.7 Flue Systems
Horizontal
The flue/terminal assembly supplied is suitable for a wall thickness of between 150mm and 400mm.
A flue/terminal assembly suitable for a wall thickness of up to 600mm is also available.
Both the flue/terminal assemblies are telescopic and the minimum lengths (150 mm/6 in) are achieved by cutting.
1m flue extensions are available. Under no circumstances should the total flue length exceed - 3.4m 30 - 70 models.
- 2.4m 80 models.
Vertical
1. Twin Tube system.
30 - 80 models.
Maximum actual length 7m (7 extensions)
Maximum equivalent resistance = 7m
2. Vertical Concentric system.
30 - 70 models - Maximum actual length 3.4m, equivalent resistance = 3.4m.
80 models - Maximum actual length 2.4m, equivalent resistance = 2.4m.
Vertex
The maximum primary flue length is 3.4m.
The maximum secondary flue length is: 30 model 5m
40 model 5.5m
50 & 60 models 6m
Note: The flue lengths quoted refer to straight lengths. For the effects of bends and offsets see Section 2.2 'Install
the Flue' or the appropriate flue instructions.
Installation Requirements - Page 8
1.8 Flue Terminal Location
If a horizontal flue is sited less than 2m above a balcony, above ground, or above a flat roof to which people have access, a
suitable terminal guard must be fitted. This serves two purposes, to protect the terminal against damage or interference and to
protect passers-by. A terminal guard is available (Sales Code: PTERMGUARDEF).
Note: Where a flue terminal is installed less than 1 metre from a plastic, or painted gutter, or 500mm from painted eaves, an
aluminium shield 1 metre long, should be fitted to the underside of the gutter or painted surface. A suitable wall plate should be
fitted to the painted wall surface of a mobile home.
IMPORTANT: It is absolutely ESSENTIAL, to ensure that products of combustion discharging from the terminal cannot re-enter the
building, or any other adjacent building, through ventilators, windows, doors, natural air infiltration, or forced ventilation/air
conditioning. If products of combustion are found to be re-entering any building, the appliance MUST be turned OFF
IMMEDIATELY.
POSITION MIN. DISTANCE mm
TO EDGE OF TERMINAL
HORIZONTAL FLUES
A
B
C
D
E
F
G
H
I
J
K
L
N
P
Q
R
S
Models
DIRECTLY BELOW AN OPENABLE
WINDOW, AIR VENT, OR ANY OTHER
VENTILATION OPENING
BELOW GUTTER, DRAIN/SOIL PIPE
BELOW EAVES
BELOW A BALCONY/CARPORT ROOF
FROM VERTICAL DRAIN PIPES AND
SOIL PIPES
FROM INTERNAL OR EXTERNAL CORNERS
ABOVE ADJACENT GROUND OR BALCONY
LEVEL
FROM A SURFACE FACING THE TERMINAL
FACING TERMINALS
FROM OPENING (DOOR/WINDOW IN
CARPORT INTO DWELLING
VERTICALLY FROM A TERMINAL ON THE
SAME WALL
HORIZONTALLY FROM A TERMINAL ON
THE SAME WALL
VERTICAL FLUES
ABOVE ROOF LEVEL (TO BASE OF TERMINAL)
FROM ADJACENT WALL TO FLUE
FROM INTERNAL CORNER TO FLUE
BELOW EAVES OR BALCONY
FROM FACING TERMINAL
30 - 60
300
25
25
25
25
25
300
600
1,200
1,200
1,500
300
300
210
230
600
1,200
70 - 80
300
25
25
25
25
100
300
600
1,200
1,200
1,500
300
300
210
230
600
1,200
1.9 The System
The boiler must be used on Indirect Fully Pumped systems only,
which may be sealed or open vented.
The system should be designed so that the maximum static
head does not exceed 30.5m (100ft) and a minimum of 150mm
(6in).
On all systems the pump live connection should be wired to the
boiler terminal block, it will then be controlled by the pump over-
run. This will ensure that the pump will continue to run after
boiler shut down if the water temperature is high, thus
preventing nuisance operation of the overheat thermostat.
It is important that where electrically operated zone valves are
used the boiler is wired so it does not cycle when the zone
valves are closed. Also, systems fitted with controls that close
both hot water and central heating circuits while the boiler is still
hot, must be fitted with a by-pass circuit to dissipate the
residual heat from within the boiler.
If a three port valve is used as shown in Fig. 3 a by-pass is not
necessary since one circuit is always open.
Where a pair of two port valves are used, a by-pass is
necessary. The total length of the by-pass circuit taken from the
boiler connections should be greater than 4 metres of 22mm
pipe. It should be fitted with a lockshield valve and be adjusted
to maintain a minimum flow through the boiler of 4.5litres/min (1
gal/min).
Installation Requirements - Page 9
Systems fitted with controls which allow the boiler to operate
when both the hot water and central heating circuits are
closed i.e. mechanically operated thermostatic control
valves, must be fitted with a by-pass circuit of:-
1. A minimum length of bypass of 2m of 22mm dia. Pipe.
2. Maintaining a minimum water flow rate through the
boiler of 9 litres/min (2 gal/min).
A suggested method of meeting these requirements by using
a bathroom radiator fitted with two lockshield valves is
shown in Fig. 3.
Additional system information can be found in the Control
Systems, pipework and Wiring Guide.
Drain off taps should be fitted in the pipework close to the
boiler and in the low points of the system.
Note: Although the system can be emptied using the drain
off taps installed in the pipework around the system, to
empty the boiler it is necessary to remove the drain off screw
positioned on the heat exchanger.
Sealed Systems
Note: If the sealed system kit (Part No. 238027) is Not being
used the installation must comply with the following
requirements.
Installation
The installation must comply with the requirements of BS
6798: 1987 and BS 5449: Pt 1. The British Gas publication
"British Gas Specification for Domestic Wet Central Heating
Systems" should also be consulted.
Pressure Relief Valve
A non-adjustable spring-loaded pressure relief valve, preset
to operate at 3 bar (45lbf/in
2
) shall be used. It must comply
with BS 6759: Pt 1. and include a manual testing device. It
shall be positioned in the flow pipe either horizontally or
vertically upwards and close to the boiler. No shut-off valves
are to be placed between the boiler and the safety valve.
The valve should be installed with a discharge pipe which
permits the safe discharge of steam and hot water such that
no hazard to persons or damage to electrical components is
caused.
Pressure Gauge
A pressure gauge incorporating a fill pressure indicator,
covering the range 0 - 4 bar (60 lbf/in
2
) shall be fitted to the
system. It should be connected to the system, preferably at
the same point as the expansion vessel. Its location should
be visible from the filling point.
Expansion Vessel
A diaphragm type expansion vessel to BS 4814: Pt 1. Shall
be fitted close to the inlet side of the pump. The connecting
pipework should not be less than 15mm. Pipework
connecting the expansion vessel should not incorporate
valves of any sort. Methods of supporting the vessel are
supplied by the vessel manufacturer. The nitrogen or air
charge pressure of the expansion vessel shall not be less
than the hydrostatic head, (height of the top point of the
system above the expansion vessel). To size the
Expansion vessel it is first necessary to calculate the volume
of water in the system in litres. The following volumes may
be used as a conservative guide to calculating the system
volume.
Boiler Heat Exchanger: 2.1 litres
Small Bore Pipework: 1 litre per kW of system
output
Micro Bore Pipework: 7 litres
Steel Panel Radiators: 8 litres per kW of system
output
Low Water Capacity Radiators: 2 litres per kW of system
output
Hot Water Cylinder: 2 litres
If the system is extended, the expansion vessel volume may
have to be increased unless provision has been made for
extension. Where a vessel of the calculated size is not
available, the next available larger size should be used. The
boiler flow temperature is controlled at approximately 82°C.
The vessel size can now be determined from the information
in Table 1 where V = System volume in litres.
Vessel Charge Pressure (bar)
Initial System Pressure (bar)
Expansion Vessel Volume (litres)
0.5
1.0
V x 0.11
1.5
1.0
V x 0.087
Table 1.
cylinder fitted with an immersion calorifier suitable for
operating at a gauge pressure of 0.3 bar (5 lbf/in
2
) in excess
of safety valve setting. Single feed indirect cylinders are not
suitable for sealed systems.
Method of Make-up
Provision shall be made for replacing water loss from the
system either:-
i) from a make-up vessel or tank mounted in a position
higher than the top point of the system, and
connected through a non-return valve to the system
on the return side of the hot water cylinder or the
return side of all heat emitters.
or
ii) where access to a make-up vessel would be difficult
by using the mains top up method or a remote
automatic pressurisation and make-up unit as shown
in Figs. 5 & 6.
Mains Connection
There shall be no connection to the mains water supply or to
the water storage tank which supplies domestic hot water
even though a non-return valve, without the approval of the
Local Water Authority.
Filling Point
The system shall be fitted with a filling point at low level
which incorporates a stop valve to BS 1010 and a double
check valve (approved by the National Water Council) to be
fitted in this order from the system mains, see Fig. 5.
Installation Requirements - Page 10
Fig 3
Fig 4
Installation Requirements - Page 11
Circulation Pump Selection
The resistance through the heat exchanger when operating
with a water flow rate producing an 11°C temperature rise at
maximum boiler output are shown in the table. If other
controls such as three position valves are used in the
system, the resistance through them, quoted in their
manufacturers literature must be taken into account. The
pump may be fitted on either the flow or return and MUST be
wired directly to the boiler terminal block. It must be fitted
with two isolating valves which are positioned as close to the
pump as possible. Closing of any valve must always leave
the open vent unobstructed.
Water Flow Rate Boiler Resistance
30
40
50
60
70
80
I/min
11.5
15.2
19.2
22.9
26.7
30.5
mbar
17.5
36.1
44.9
59.5
80.9
105.3
m
0.18
0.37
0.46
0.61
0.83
1.08
Flue Kits - Page 12
Optional Extras - Flues - Page 13
Installation instructions included as necessary with each kit.
System and Other Kits - Page 14
System and other Kits - Page 15
2. Installation - Page 16
2.1 Unpack & Prepare the Boiler
These instructions assume you have decided on
where the boiler will be located and the type of flue
system to be used.
1. Carefully unpack the boiler.
2. Do not discard any packaging until all the items
are accounted for.
3. Open the controls cover, remove the securing
screw and washer, pull off the controls cover
and put safely aside.
4. Remove two screws and washers, remove the
white front case and put safely aside.
5. Place the mounting template in the proposed
boiler position ensuring that it is level. Minimum
clearances are accounted for on the template.
6. Mark the flue hole, remove the template and
carefully cut the flue hole through the wall. See
fig.8 for Side Flue.
7. Place the mounting template centrally over the
hole (ensure the template is level) and mark out
the two screw fixing hole positions.
8. Remove the template and drill the two holes
using a 7mm drill.
9. Insert wall plugs and secure the mounting
bracket to the wall using two No. 12 x 2"
woodscrews.
10. Lift the boiler onto the mounting bracket, slide
both boiler securing clips over the mounting
bracket (this prevents the boiler from being
accidently lifted off the the mounting bracket),
see fig.7.
11. The third screw provided is also to prevent the
boiler from being lifted off the mounting bracket,
once the boiler is mounted on the wall. This
screw can be replaced by an anti-theft kit see
note below.
Note: There is provision for an anti-theft securing
point (sales code: SUPKITP) which may be used if
required.
2.2 Install the Flue
Maximum flue lengths are as follows:
30 - 70 Models - 3.4M
80 Model - 2.4M
These instructions are for rear and side flue
applications.
Rear Flue
1. Measure the wall thickness and add 66mm (or
106mm for installations using the System Boiler or
Stand Off Kits).
Side Flue
1. Determine the X dimension (wall thickness +
distance to boiler centreline).
For both Rear & Side Flues
2. Extend the telescopic flue to the required length,
minimum 20mm overlap.
3. Drill through the pilot hole and secure with self
tapping screw.
Installation - Page 17
4. Wrap tape around the joint on the outer duct
to seal the flue, slide drip ring into a position
to coincide with the air gap in the wall (cavity
wall).
5. Slide the flue through the hole until it stops on
the pin.
6. The boiler is supplied with the flue elbow set
to the rear. For side outlet slacken the
screws and turn the elbow to the required
position and re-tighten screws. Ensure that
the seals are still correctly located.
7. Hang the boiler onto the mounting bracket.
To square the boiler to the wall adjust the
boiler alignment screws on the back panel of
the boiler.
8. Slide the flue back until it engages in the
elbow bayonet connection, twist anti-
clockwise to lock.
9. Drill through pilot hole and lock flue in position
with the self tapping screw provided.
10 Make good the wall around the flue, both
outside and inside.
For extension kits refer to page 12 & 13. If a
Horizontal Extension is required this MUST be
combined with a Standard Flue as shown below in
the Maximum Flue Length Guide.
Installation - Page 18
2.3 Connect the Power S
1.
controls panel. Feed the cables up and over
, through the clamp
wires, brown to L and blue to N and
).
Note:
cable, ensure that the length of the earth wire
is such, that if the power supply cable pulls
wires become taut before the earth wire.
2. ted through
the hole in the base of the rear cover, through
terminal connection.
3.
the terminal block and the cable clamp, then
Ensure sufficient slack is available to the
cable clamps to allow the control panel to
panel.
I
section 2.4 performing steps 4 and 5
below.
Secure the controls assembly to the chassis
using the screw previously removed.
Carry out preliminary electrical system checks
i.e. Earth Continuity, Short Circuit, Polarity
Frost Thermostat:
If a Frost Thermostat is to be fitted, the
external to the boiler.
The Frost Thermostat should be connected
the supply cable to the boiler.
Do not switch on the electricity supply at
2.4 Install the Optional Programmer
Carefully remove the blanking panel from the facia and
2. Remove the two plastic sleeves and connect the
circuit board.
3.
immediately below the programmer using the two
screws provided.
2.5 Connect the Gas Supply
supply using a suitable adaptor to the gas cock.
Important:
assembled to the gas cock.
The pipe diameter required will depend on the boiler model
supply pipe is selected in accordance with BS 6891 so that
an adequate gas supply to the boiler is provided.
Installation - Page 20
2.6 Connect the Water System
1. Connect system pipework to the boiler,
compression fittings should be used.
Note: Drain off taps should be installed at the
lowest points in the system.
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